# output.overrideBrowserslist

- **Type:** `string[]`
- **Default:** `undefined`

Specifies the range of target browsers that the project is compatible with.

This value will be used by tools such as [SWC](https://github.com/swc-project/swc) and [Lightning CSS](https://github.com/parcel-bundler/lightningcss) to identify the JavaScript syntax that needs to be transformed and the CSS browser prefixes that need to be added.

## Priority

The `overrideBrowserslist` config will override the `.browserslistrc` config file in the project and the `browserslist` field in package.json.

In most cases, it is recommended to use the `.browserslistrc` file rather than the `overrideBrowserslist` config. Because the `.browserslistrc` file is the official config file, it is more general and can be recognized by other libraries in the community.

> For more details, see [Browserslist](/guide/advanced/browserslist).

## Default value

If there is no `browserslist` configs defined in the project, nor `overrideBrowserslist` defined, then Rsbuild will set the default browserslist to:

```js
['chrome >= 87', 'edge >= 88', 'firefox >= 78', 'safari >= 14'];
```

## Example

An example of mobile web applications:

```ts title="rsbuild.config.ts"
export default {
  output: {
    overrideBrowserslist: [
      'iOS >= 9',
      'Android >= 4.4',
      'last 2 versions',
      '> 0.2%',
      'not dead',
    ],
  },
};
```

Check out the [browserslist documentation](https://github.com/browserslist/browserslist) to learn more about browserslist.

## Set by environment

When you build for multiple [environments](/config/environments), you can set different browserslist for each environment:

For example, set different browserslist for `web` and `node` environments:

```ts title="rsbuild.config.ts"
export default {
  environments: {
    web: {
      output: {
        target: 'web',
        overrideBrowserslist: ['iOS >= 9', 'Android >= 4.4'],
      },
    },
    node: {
      output: {
        target: 'node',
        overrideBrowserslist: ['node >= 20'],
      },
    },
  },
};
```
